I assume you don’t want to count out individual saffron threads though. If you don’t want to buy a gram scale, here’s what I’d do. A lot of consumer packs of saffron come in between 1/2 gram and 1 gram (we sell ours in 0.8 gram packs). It might be easier to get a new package (or packages) and guesstimate the quantity by taking a portion of their listed weight.